This article on the by Robert Weatherhead is spot on.
To our AMs/CAs/Sales Drones, the five points here are a great starting point for your own quick review of a potential or new client's PPC campaign (assuming they already have one that they wish us to assume or improve).
Number 3 you may not know much about, so don't worry your pretty little faces over it too much. But 1 and 5 are so obvious they might as well be punching you in the face.